Question

The thin outermost layer of the solid Earth is called the:

mantle
asthenosphere
outer core
crust

Answer 1

The correct answer is crust: this is the outermost layer of Earth!

The innermost part is the core, so outer core would be the innermost of all the mentioned ones.

After this the mantle is more outermost, and after this the asthenosphere. The outermost of the options is the crust!